Fuel pump location suggestions

Post by **MattH** » Tue Sep 27, 16 12:13 pm

I have obtained a new electric Facet fuel pump for the Challenger (thanks Scooby!) and wonder about the best location, engine bay, boot, or up under the back axle tunnel, near the fuel tank?

I currently only run the standard manual engine driven pump and on any hard acceleration it can't keep up and there is a huge flat spot where it virtually dies (I have a clear fuel filter and can see it emptying).
I plan to run the electric, keep the manual pump in place, and pump through it, so I have a safety blanket of the old one if the Facet packs up.

Has anyone done it this way, and where did you mount the pump?

The instructions say to have it vertical and near the tank, but I can't see why that is so vital.

Also is it best to just wire it off the ignition circuit through a relay?

All advice gratefully received

SJH · Post by **SJH** » Tue Sep 27, 16 12:55 pm

Hi Matt,
The pump needs to be as close to the tank as possible and as low down as possible due to the fact electric pumps push rather than pull the fuel. Also it is usually better to have it outside the car(not in the boot) as the pumps cool by fuel passing through and to the air, which will be better outside of the car.

Shayne

Post by **MattH** » Tue Sep 27, 16 8:26 pm

Thanks Shayne, that makes alot of sense, I will try to find a spot near the back.
Matt

andyrob · Post by **andyrob** » Tue Sep 27, 16 8:45 pm

as said near the fuel tank under the car, you will need to do away with the mech pump, but you will need a regulator ( mounted in engine bay) with no return to tank - this is classed as a 'dead head system' and will be fine
Without a reg the pump will keep pumping and flood carb plus pump pressure will be too much for carb
2-3 psi will be fine to feed carb

Post by **MattH** » Wed Sep 28, 16 8:13 am

Ah, didn't realise I would need a regulator, thanks for pointing that out Andy.
Any recommendations on regulators, ones to avoid??

Pete · Post by **Pete** » Wed Sep 28, 16 8:22 am

MattH wrote:Ah, didn't realise I would need a regulator, thanks for pointing that out Andy.
Any recommendations on regulators, ones to avoid??

I am sure I have a spare in return for Beer

Post by **MattH** » Thu Sep 29, 16 9:22 am

Pete wrote:
MattH wrote:Ah, didn't realise I would need a regulator, thanks for pointing that out Andy.
Any recommendations on regulators, ones to avoid??
I am sure I have a spare in return for Beer

That sounds like a very good recommendation to me.

Pete · Post by **Pete** » Thu Sep 29, 16 9:58 am

You will need -AN fittings for it though.

"Torques" on eBay are quite reasonable (but I find are now getting more expensive it would seem).

drewcrane · Post by **drewcrane** » Thu Sep 29, 16 4:57 pm

also use a relay

Blue · Post by **Blue** » Thu Sep 29, 16 6:38 pm

Do you actually know what the problem is Matt? Just thinking you could go to the trouble of fitting an electric pump only to find the fuel line is kinked or partially blocked, or even a fuel pickup issue? Just thinking aloud here....

mopar_mark · Post by **mopar_mark** » Thu Sep 29, 16 8:30 pm

Pete wrote:You will need -AN fittings for it though.

"Torques" on eBay are quite reasonable (but I find are now getting more expensive it would seem).

FYI
My experience with torques fittings on fuel were not good. I think they would be OK, if using the car very regularly, but if left they seem to dry out & allow fuel to leak badly. Once fuel is back in the line they seem to swell & seal again.

I ended up removing all mine, Jerry had similar problems & also removed. I have not had issues on Torques on any water related lines.